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f: R->R is defined by f(x)=(e^(x^2)-e^(-...

`f: R->R` is defined by `f(x)=(e^(x^2)-e^(-x^2))/(e^(x^2)+e^(-x^2))` is :

A

f(x) is an increasing function

B

f(x) is a decreasing function

C

f(x) is a onto

D

None of the above

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The correct Answer is:
D
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